Ear plug



FIG. 1 is a front perspective view of an ear plug;

FIG. 2 is a rear view of the ear plug of FIG. 1;

FIG. 3 is a top view of the ear plug of FIG. 1;

FIG. 4 is a bottom view of the ear plug of FIG. 1;

FIG. 5 is a right side view of the ear plug of FIG. 1;

FIG. 6 is a left side view of the ear plug of FIG. 1; and,

FIG. 7 is a front view of the ear plug of FIG. 1.

The broken line showing and all within forms no part of the claimed design. 

CLAIM The ornamental design for an ear plug, as shown and described. 